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limboai/editor/tree_search.cpp

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/**
* tree_search.cpp
* =============================================================================
* Copyright 2021-2024 Serhii Snitsaruk
*
* Use of this source code is governed by an MIT-style
* license that can be found in the LICENSE file or at
* https://opensource.org/licenses/MIT.
* =============================================================================
*/
#ifdef TOOLS_ENABLED
#include "tree_search.h"
#include "../util/limbo_compat.h" // for edscale
#include "../util/limbo_string_names.h"
#include "../util/limbo_utility.h"
#ifdef LIMBOAI_MODULE
#include "core/math/math_funcs.h"
#include "editor/editor_interface.h"
#include "editor/themes/editor_scale.h"
#include "scene/main/viewport.h"
#include "scene/resources/font.h"
#include "scene/resources/style_box_flat.h"
#endif // LIMBOAI_MODULE
#ifdef LIMBOAI_GDEXTENSION
#include <godot_cpp/classes/editor_interface.hpp> // for edge scale
#include <godot_cpp/classes/font.hpp>
#include <godot_cpp/classes/style_box_flat.hpp>
#include <godot_cpp/classes/viewport.hpp>
#include <godot_cpp/core/math.hpp>
#endif // LIMBOAI_GDEXTENSION
#define UPPER_BOUND (1 << 15) // for substring search.
/* ------- TreeSearch ------- */
void TreeSearch::_clean_callable_cache() {
ERR_FAIL_COND(!tree_reference);
HashMap<TreeItem *, Callable> new_callable_cache;
new_callable_cache.reserve(callable_cache.size());
for (int i = 0; i < ordered_tree_items.size(); i++) {
TreeItem *cur_item = ordered_tree_items[i];
if (callable_cache.has(cur_item)) {
new_callable_cache[cur_item] = callable_cache[cur_item];
}
}
callable_cache = new_callable_cache;
}
void TreeSearch::_filter_tree() {
ERR_FAIL_COND(!tree_reference);
if (matching_entries.is_empty()) {
return;
}
_filter_tree(tree_reference->get_root(), false);
}
void TreeSearch::_filter_tree(TreeItem *p_item, bool p_parent_matching) {
bool visible = (number_matches.has(p_item) && (number_matches.get(p_item) > 0)) || p_parent_matching;
p_item->set_visible(visible);
bool is_matching = _vector_has_bsearch(matching_entries, p_item);
for (int i = 0; i < p_item->get_child_count(); i++) {
_filter_tree(p_item->get_child(i), is_matching | p_parent_matching);
}
}
// Makes all tree items visible.
void TreeSearch::_clear_filter() {
ERR_FAIL_COND(!tree_reference);
Vector<TreeItem *> items = { tree_reference->get_root() };
for (int idx = 0; idx < items.size(); idx++) {
TreeItem *cur_item = items[idx];
cur_item->set_visible(true);
for (int i = 0; i < cur_item->get_child_count(); i++) {
items.push_back(cur_item->get_child(i));
}
}
}
void TreeSearch::_highlight_tree() {
ERR_FAIL_COND(!tree_reference);
for (HashMap<TreeItem *, int>::Iterator it = number_matches.begin(); it != number_matches.end(); ++it) {
TreeItem *tree_item = it->key;
_highlight_tree_item(tree_item);
}
tree_reference->queue_redraw();
}
void TreeSearch::_highlight_tree_item(TreeItem *p_tree_item) {
int num_m = number_matches.has(p_tree_item) ? number_matches.get(p_tree_item) : 0;
if (num_m == 0) {
return;
}
// Make sure to also call any draw method already defined.
Callable parent_draw_method;
if (p_tree_item->get_cell_mode(0) == TreeItem::CELL_MODE_CUSTOM) {
parent_draw_method = p_tree_item->get_custom_draw_callback(0);
}
// If the cached draw method is already applied, do nothing.
if (callable_cache.has(p_tree_item) && parent_draw_method == callable_cache.get(p_tree_item)) {
return;
}
Callable draw_callback = callable_mp(this, &TreeSearch::_draw_highlight_item).bind(parent_draw_method);
callable_cache[p_tree_item] = draw_callback;
// This is necessary because of the modularity of this implementation.
// Cache render properties of entry.
String cached_text = p_tree_item->get_text(0);
Ref<Texture2D> cached_icon = p_tree_item->get_icon(0);
int cached_max_width = p_tree_item->get_icon_max_width(0);
// This removes render properties in entry.
p_tree_item->set_custom_draw_callback(0, draw_callback);
p_tree_item->set_cell_mode(0, TreeItem::CELL_MODE_CUSTOM);
// Restore render properties.
p_tree_item->set_text(0, cached_text);
p_tree_item->set_icon(0, cached_icon);
p_tree_item->set_icon_max_width(0, cached_max_width);
}
// Custom draw callback for highlighting (bind the parent_draw_method to this)
void TreeSearch::_draw_highlight_item(TreeItem *p_tree_item, const Rect2 p_rect, const Callable p_parent_draw_method) {
if (!p_tree_item) {
return;
}
// Call any parent draw methods such as for probability FIRST.
p_parent_draw_method.call(p_tree_item, p_rect);
// First part: outline
if (matching_entries.has(p_tree_item)) {
// Font info
Ref<Font> font = p_tree_item->get_custom_font(0);
if (font.is_null()) {
font = p_tree_item->get_tree()->get_theme_font(LW_NAME(font));
}
ERR_FAIL_NULL(font);
float font_size = p_tree_item->get_custom_font_size(0);
if (font_size == -1) {
font_size = p_tree_item->get_tree()->get_theme_font_size(LW_NAME(font));
}
// Substring size
String string_full = p_tree_item->get_text(0);
StringSearchIndices substring_idx = _substring_bounds(string_full, _get_search_mask());
String substring_match = string_full.substr(substring_idx.lower, substring_idx.upper - substring_idx.lower);
Vector2 substring_match_size = font->get_string_size(substring_match, HORIZONTAL_ALIGNMENT_LEFT, -1.f, font_size);
String substring_before = string_full.substr(0, substring_idx.lower);
Vector2 substring_before_size = font->get_string_size(substring_before, HORIZONTAL_ALIGNMENT_LEFT, -1.f, font_size);
// Stylebox
Ref<StyleBox> stylebox = p_tree_item->get_tree()->get_theme_stylebox(LW_NAME(Focus));
ERR_FAIL_NULL(stylebox);
// Extract separation
float h_sep = p_tree_item->get_tree()->get_theme_constant(LW_NAME(h_separation));
// Compose draw rect
const Vector2 PADDING = Vector2(4., 2.);
Rect2 draw_rect = p_rect;
Vector2 rect_offset = Vector2(substring_before_size.x, 0);
rect_offset.x += p_tree_item->get_icon_max_width(0);
rect_offset.x += (h_sep + 4. * EDSCALE);
rect_offset.y = (p_rect.size.y - substring_match_size.y) / 2; // center box vertically
draw_rect.position += rect_offset - PADDING / 2;
draw_rect.size = substring_match_size + PADDING;
// Draw
stylebox->draw(p_tree_item->get_tree()->get_canvas_item(), draw_rect);
}
// Second part: draw number
int num_mat = number_matches.has(p_tree_item) ? number_matches.get(p_tree_item) : 0;
if (num_mat > 0) {
float h_sep = p_tree_item->get_tree()->get_theme_constant(LW_NAME(h_separation));
Ref<Font> font = tree_reference->get_theme_font(LW_NAME(font));
float font_size = tree_reference->get_theme_font_size(LW_NAME(font)) * 0.75;
String num_string = String::num_int64(num_mat);
Vector2 string_size = font->get_string_size(num_string, HORIZONTAL_ALIGNMENT_CENTER, -1, font_size);
Vector2 text_pos = p_rect.position;
text_pos.x += p_rect.size.x - string_size.x - h_sep;
text_pos.y += font->get_descent(font_size) + p_rect.size.y / 2.; // center vertically
font->draw_string(tree_reference->get_canvas_item(), text_pos, num_string, HORIZONTAL_ALIGNMENT_CENTER, -1, font_size);
}
}
void TreeSearch::_update_matching_entries(const String &p_search_mask) {
Vector<TreeItem *> accum;
_find_matching_entries(tree_reference->get_root(), p_search_mask, accum);
matching_entries = accum;
}
/* Linaerizes the tree into [ordered_tree_items] like so:
- i1
- i2
- i3
- i4 ---> [i1,i2,i3,i4]
*/
void TreeSearch::_update_ordered_tree_items(TreeItem *p_tree_item) {
if (!p_tree_item)
return;
if (p_tree_item == p_tree_item->get_tree()->get_root()) {
ordered_tree_items.clear();
}
// Add the current item to the list.
ordered_tree_items.push_back(p_tree_item);
// Recursively collect items from the first child.
TreeItem *child = p_tree_item->get_first_child();
while (child) {
_update_ordered_tree_items(child);
child = child->get_next();
}
}
void TreeSearch::_update_number_matches() {
ERR_FAIL_COND(!tree_reference);
number_matches.clear();
number_matches.reserve(ordered_tree_items.size());
_update_number_matches(tree_reference->get_root());
}
void TreeSearch::_update_number_matches(TreeItem *item) {
for (int i = 0; i < item->get_child_count(); i++) {
TreeItem *child = item->get_child(i);
_update_number_matches(child);
}
int count = _vector_has_bsearch(matching_entries, item) ? 1 : 0;
for (int i = 0; i < item->get_child_count(); i++) {
TreeItem *child = item->get_child(i);
count += number_matches.has(child) ? number_matches.get(child) : 0;
}
if (count == 0) {
return;
}
number_matches[item] = count;
}
String TreeSearch::_get_search_mask() const {
ERR_FAIL_COND_V(!search_panel, "");
return search_panel->get_text();
}
void TreeSearch::_find_matching_entries(TreeItem *p_tree_item, const String &p_search_mask, Vector<TreeItem *> &p_accum) const {
if (!p_tree_item) {
return;
}
StringSearchIndices item_search_indices = _substring_bounds(p_tree_item->get_text(0), p_search_mask);
if (item_search_indices.hit()) {
p_accum.push_back(p_tree_item);
}
for (int i = 0; i < p_tree_item->get_child_count(); i++) {
TreeItem *child = p_tree_item->get_child(i);
_find_matching_entries(child, p_search_mask, p_accum);
}
// Sort the result if we are at the root.
if (p_tree_item == p_tree_item->get_tree()->get_root()) {
p_accum.sort();
}
return;
}
// Returns the lower and upper bounds of a substring. Does fuzzy search: Simply looks if words exist in right ordering.
// Also ignores case if p_search_mask is lowercase. Example:
// p_searcheable = "TimeLimit 2 sec", p_search_mask = limit 2 sec -> [4,14]. With p_search_mask = "LimiT 2 SEC" or "Limit sec 2" -> [-1,-1]
TreeSearch::StringSearchIndices TreeSearch::_substring_bounds(const String &p_searchable, const String &p_search_mask) const {
StringSearchIndices result;
result.lower = UPPER_BOUND;
result.upper = 0;
if (p_search_mask.is_empty()) {
return result; // Early return if search_mask is empty.
}
// Determine if the search should be case-insensitive.
bool is_case_insensitive = (p_search_mask == p_search_mask.to_lower());
String searchable_processed = is_case_insensitive ? p_searchable.to_lower() : p_searchable;
PackedStringArray words = p_search_mask.split(" ");
int word_position = 0;
for (const String &word : words) {
if (word.is_empty()) {
continue; // Skip empty words.
}
String word_processed = is_case_insensitive ? word.to_lower() : word;
// Find the position of the next word in the searchable string.
word_position = searchable_processed.find(word_processed, word_position);
if (word_position < 0) {
// If any word is not found, return an empty StringSearchIndices.
return StringSearchIndices();
}
// Update lower and upper bounds.
result.lower = MIN(result.lower, word_position);
result.upper = MAX(result.upper, static_cast<int>(word_position + word.length()));
}
return result;
}
void TreeSearch::_select_item(TreeItem *p_item) {
if (!p_item)
return;
ERR_FAIL_COND(!tree_reference || p_item->get_tree() != tree_reference);
// First unfold ancestors
TreeItem *ancestor = p_item->get_parent();
while (ancestor) {
ancestor->set_collapsed(false);
ancestor = ancestor->get_parent();
}
// Then scroll to [item]
tree_reference->scroll_to_item(p_item);
// ...and select it
tree_reference->deselect_all();
tree_reference->set_selected(p_item, 0);
}
void TreeSearch::_select_first_match() {
if (matching_entries.size() == 0) {
return;
}
for (int i = 0; i < ordered_tree_items.size(); i++) {
TreeItem *item = ordered_tree_items[i];
if (!_vector_has_bsearch(matching_entries, item)) {
continue;
}
_select_item(item);
return;
}
}
void TreeSearch::_select_last_match() {
if (matching_entries.size() == 0) {
return;
}
for (int i = ordered_tree_items.size() - 1; i >= 0; i--) {
TreeItem *item = ordered_tree_items[i];
if (!_vector_has_bsearch(matching_entries, item)) {
continue;
}
_select_item(item);
return;
}
}
void TreeSearch::_select_previous_match() {
if (matching_entries.size() == 0) {
return;
}
TreeItem *selected = tree_reference->get_selected();
if (!selected) {
_select_last_match();
return;
}
// Find [selected_idx] among ordered_tree_items.
int selected_idx = 0;
for (int i = ordered_tree_items.size() - 1; i >= 0; i--) {
if (ordered_tree_items[i] == selected) {
selected_idx = i;
break;
}
}
// Find first entry before [selected_idx].
for (int i = MIN(ordered_tree_items.size() - 1, selected_idx) - 1; i >= 0; i--) {
TreeItem *item = ordered_tree_items[i];
if (_vector_has_bsearch(matching_entries, item)) {
_select_item(item);
return;
}
}
// Wrap around.
_select_last_match();
}
void TreeSearch::_select_next_match() {
if (matching_entries.size() == 0) {
return;
}
TreeItem *selected = tree_reference->get_selected();
if (!selected) {
_select_first_match();
return;
}
// Find [selected_idx] among ordered_tree_items
int selected_idx = 0;
for (int i = 0; i < ordered_tree_items.size(); i++) {
if (ordered_tree_items[i] == selected) {
selected_idx = i;
break;
}
}
// Find first entry after [selected_idx].
for (int i = MAX(0, selected_idx) + 1; i < ordered_tree_items.size(); i++) {
TreeItem *item = ordered_tree_items[i];
if (_vector_has_bsearch(matching_entries, item)) {
_select_item(item);
return;
}
}
// Wrap around.
_select_first_match();
}
void TreeSearch::_on_search_panel_closed() {
if (!tree_reference) {
return;
}
tree_reference->grab_focus();
}
template <typename T>
inline bool TreeSearch::_vector_has_bsearch(Vector<T *> &p_vec, T *element) const {
int idx = p_vec.bsearch(element, true);
bool in_array = idx >= 0 && idx < p_vec.size();
return in_array && p_vec[idx] == element;
}
void TreeSearch::notify_item_edited(TreeItem *item) {
if (item->get_cell_mode(0) != TreeItem::CELL_MODE_CUSTOM) {
return;
}
_highlight_tree_item(item);
}
// Called as a post-processing step for the already constructed tree.
void TreeSearch::update_search(Tree *p_tree) {
ERR_FAIL_COND(!search_panel || !p_tree);
tree_reference = p_tree;
if (!search_panel->is_visible() || search_panel->get_text().length() == 0) {
// Clear and redraw if search was active recently.
if (was_searched_recently) {
_clear_filter();
number_matches.clear();
matching_entries.clear();
was_searched_recently = false;
p_tree->queue_redraw();
}
return;
}
was_searched_recently = true;
String search_mask = search_panel->get_text();
TreeSearchMode search_mode = search_panel->get_search_mode();
_update_ordered_tree_items(p_tree->get_root());
_update_matching_entries(search_mask);
_update_number_matches();
_highlight_tree();
if (search_mode == TreeSearchMode::FILTER) {
_filter_tree();
was_filtered_recently = true;
} else if (was_filtered_recently) {
_clear_filter();
was_filtered_recently = false;
}
_clean_callable_cache();
}
TreeSearch::TreeSearch(TreeSearchPanel *p_search_panel) {
search_panel = p_search_panel;
search_panel->connect(LW_NAME(text_submitted), callable_mp(this, &TreeSearch::_select_next_match));
search_panel->connect(LW_NAME(Close), callable_mp(this, &TreeSearch::_on_search_panel_closed));
search_panel->connect("select_previous_match", callable_mp(this, &TreeSearch::_select_previous_match));
}
/* !TreeSearch */
/* ------- TreeSearchPanel ------- */
void TreeSearchPanel::_initialize_controls() {
line_edit_search = memnew(LineEdit);
check_button_filter_highlight = memnew(CheckBox);
close_button = memnew(Button);
find_next_button = memnew(Button);
find_prev_button = memnew(Button);
label_filter = memnew(Label);
line_edit_search->set_placeholder(TTR("Search tree"));
close_button->set_theme_type_variation(LW_NAME(FlatButton));
find_next_button->set_theme_type_variation(LW_NAME(FlatButton));
find_prev_button->set_theme_type_variation(LW_NAME(FlatButton));
close_button->set_tooltip_text("Hide");
find_next_button->set_tooltip_text("Next Match");
find_prev_button->set_tooltip_text("Previous Match");
// Positioning and sizing
set_anchors_and_offsets_preset(LayoutPreset::PRESET_BOTTOM_WIDE);
set_v_size_flags(SIZE_SHRINK_CENTER); // Do not expand vertically
line_edit_search->set_h_size_flags(SIZE_EXPAND_FILL);
_add_spacer(0.1); // -> Otherwise the lineedits expand margin touches the left border.
add_child(line_edit_search);
add_child(find_prev_button);
add_child(find_next_button);
_add_spacer(0.25);
add_child(check_button_filter_highlight);
add_child(label_filter);
_add_spacer(0.25);
add_child(close_button);
}
void TreeSearchPanel::_add_spacer(float p_width_multiplier) {
Control *spacer = memnew(Control);
spacer->set_custom_minimum_size(Vector2(8.0 * EDSCALE * p_width_multiplier, 0.0));
add_child(spacer);
}
void TreeSearchPanel::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_READY: {
// Close callbacks
close_button->connect(LW_NAME(pressed), Callable(this, LW_NAME(set_visible)).bind(false));
close_button->connect(LW_NAME(pressed), Callable(this, LW_NAME(emit_signal)).bind(LW_NAME(Close)));
close_button->set_shortcut(LW_GET_SHORTCUT("limbo_ai/hide_tree_search")); // TODO: use internal shortcut.
// Search callbacks
Callable c_update_requested = Callable(this, LW_NAME(emit_signal)).bind("update_requested");
Callable c_text_submitted = Callable(this, LW_NAME(emit_signal)).bind(LW_NAME(text_submitted));
Callable c_select_previous_match = Callable(this, LW_NAME(emit_signal)).bind("select_previous_match");
find_next_button->connect(LW_NAME(pressed), c_text_submitted);
find_prev_button->connect(LW_NAME(pressed), c_select_previous_match);
line_edit_search->connect(LW_NAME(text_changed), c_update_requested.unbind(1));
check_button_filter_highlight->connect(LW_NAME(pressed), c_update_requested);
line_edit_search->connect(LW_NAME(text_submitted), c_text_submitted.unbind(1));
break;
}
case NOTIFICATION_THEME_CHANGED: {
BUTTON_SET_ICON(close_button, get_theme_icon(LW_NAME(Close), LW_NAME(EditorIcons)));
BUTTON_SET_ICON(find_prev_button, get_theme_icon("MoveUp", LW_NAME(EditorIcons)));
BUTTON_SET_ICON(find_next_button, get_theme_icon("MoveDown", LW_NAME(EditorIcons)));
label_filter->set_text(TTR("Filter"));
break;
}
}
}
void TreeSearchPanel::_bind_methods() {
ADD_SIGNAL(MethodInfo("update_requested"));
ADD_SIGNAL(MethodInfo(LW_NAME(text_submitted)));
ADD_SIGNAL(MethodInfo("select_previous_match"));
ADD_SIGNAL(MethodInfo(LW_NAME(Close)));
}
TreeSearchPanel::TreeSearchPanel() {
_initialize_controls();
set_visible(false);
}
TreeSearch::TreeSearchMode TreeSearchPanel::get_search_mode() const {
if (!check_button_filter_highlight || !check_button_filter_highlight->is_pressed()) {
return TreeSearch::TreeSearchMode::HIGHLIGHT;
}
return TreeSearch::TreeSearchMode::FILTER;
}
String TreeSearchPanel::get_text() const {
if (!line_edit_search) {
return String();
}
return line_edit_search->get_text();
}
TreeSearch::SearchInfo TreeSearchPanel::get_search_info() const {
TreeSearch::SearchInfo result;
result.search_mask = get_text();
result.search_mode = get_search_mode();
result.visible = is_visible();
return result;
}
void TreeSearchPanel::set_search_info(const TreeSearch::SearchInfo &p_search_info) {
line_edit_search->set_text(p_search_info.search_mask);
check_button_filter_highlight->set_pressed(p_search_info.search_mode == TreeSearch::TreeSearchMode::FILTER);
set_visible(p_search_info.visible);
emit_signal("update_requested");
}
void TreeSearchPanel::focus_editor() {
line_edit_search->grab_focus();
}
/* !TreeSearchPanel */
#endif // TOOLS_ENABLED
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